Amazon is knocking up to 35% off Hydro Flask bottles and tumblers. Shop must-have hydration deals starting at just $16.

The 40-ounce Hydro Flask Travel Tumbler is on sale at Amazon for $25.97, down from the regular price of $39.95. That's a 35% discount.

As of Jan. 28, the 40-ounce Hydro Flask Travel Tumbler in fun Valentine's Day colorways like Zinnia, Camilla, and Bayberry Ombre are on sale at Amazon for only $25.97, marked down from the ...